Strong vortex liquid correlation from multiterminal measurements on untwinned YBa2Cu3O7-delta single crystals

Multiterminal transport measurements indicating a strongly correlated vorte x liquid above the first order melting transition in untwinned YBa2Cu3O7-de lta Single crystals are presented. The correlation is found to be surprisin gly stable for different weak variations of point disorder. We investigate the differences between intervortex and intravortex correlations in differe nt contact geometries. The results are in agreement with the local conducti vity model, with zero resistivity along straight vortex line segments.